1.Why Have eBay Login Virus?
Because Internet Explorer on eBay cannot display the webpage.
depending on what you use, you may need to whitelist the site itself from your anti-virus.
seriously no legitimate site would ever ask you for any personal details other than your security question.
If you login on the (real) eBay site with virus you should see a link for suspected fraud forward the e-mail there and they will try to follow it.
2.Why eBay Account Password Compromised?
Because Cyber attackers compromised a small number of eBay account password, allowing unauthorized access to eBay’s corporate network.
eBay revealed that attackers compromised customers' database including emails, physical addresses, encrypted passwords and dates of birth, in a hacking attack between late February and early March, but financial information like credit card numbers, as well as PayPal information were stored separately and were not compromised.
To avoid this,change your eBay password, log into your account, select Account Settings, then click "Personal Information", then "edit" next to your password. If you are using same login details for other websites, you should also update them as soon as possible.